Image stabilization detection device for motor, image stabilization motor, and electronic device

Abstract

Embodiments of the present application relate to the technical field of photography, and disclosed are an image stabilization detection device for a motor, an image stabilization motor, and an electronic device. The image stabilization detection device for a motor in the present application comprises: an upper movable support can move relative to an upper base only in a first direction; a lower movable support can move relative to the upper base in both the first direction and a second direction, and the lower movable support abuts against the upper movable support in the first direction; the movement of the lower movable support in the first direction drives the upper movable support to move correspondingly; the first direction is perpendicular to the second direction; an image sensor is fixed to the lower movable support and moves along with the lower movable support; a first detection unit is used for detecting the movement in the first direction; a second detection unit is used for detecting the movement in the second direction; and a processing unit is used for performing shake compensation on the basis of detection results of the first detection unit and the second detection unit. Therefore, the detection accuracy of the detection device is improved.

Description

A detection device for motor stabilization, a stabilization motor, and electronic equipment. Cross-referencing

[0001] This disclosure claims priority to Chinese Patent Application No. 2025205170498, filed on March 21, 2025, entitled "A detection device for motor stabilization, a stabilization motor and an electronic device", which is incorporated herein by reference in its entirety. Technical Field

[0002] This application relates to the field of camera technology, and in particular to a detection device for motor-driven image stabilization, an image stabilization motor, and an electronic device. Background Technology

[0003] Current image stabilization motors require at least three directions of lens movement control to achieve both image stabilization and focusing simultaneously. Movement control in the focusing direction (Z-axis) enables focusing, while movement control in at least two mutually perpendicular directions (X-axis and Y-axis) in a plane perpendicular to the focusing direction enables image stabilization. Therefore, a displacement detection device is needed for each direction requiring movement control.

[0004] However, the aforementioned displacement detection device setup has at least the following drawbacks: adding at least three sets of detection devices to the lens and controlling the lens to move in at least three directions makes lens movement control quite complex. Furthermore, if a Hall sensor is used as the displacement monitoring device, multiple sets of magnets need to be placed on the lens. Displacement is determined by the changes in the magnetic field corresponding to displacement in different directions. In this case, the magnetic fields of the multiple sets of magnets on the lens interfere with each other, leading to inaccurate detection results from the Hall sensor. Moreover, because the magnetic field changes non-linearly, processing the detection results is even more complex, resulting in poor image stabilization and focusing performance. Summary of the Invention

[0005] The purpose of this application is to provide a motor anti-shake detection device, an anti-shake motor, and an electronic device to improve the detection accuracy of the detection device.

[0006] To address the aforementioned technical problems, embodiments of this application provide a motor anti-shake detection device, comprising: an accommodating space enclosed by an upper base and a lower base, and an upper movable bracket and a lower movable bracket sequentially arranged within the accommodating space according to the light incident direction; the upper movable bracket can only undergo displacement change relative to the upper base in a first direction; the lower movable bracket can undergo displacement change relative to the upper base in both the first and second directions, and the lower movable bracket abuts against the upper movable bracket in the first direction, the movement of the lower movable bracket in the first direction causing the upper movable bracket to move accordingly, the first direction being perpendicular to the second direction; the motor anti-shake detection device further comprises: an image sensor, the image sensor being fixed to the lower movable bracket and moving with the lower movable bracket; the motor anti-shake detection device further comprises: a first detection unit disposed on the upper movable bracket and a second detection unit disposed on the lower movable bracket; the first detection unit is used to detect the movement in the first direction, and the second detection unit is used to detect the movement in the second direction; the motor anti-shake detection device further comprises: a processing unit, the processing unit being used to perform shake correction based on the detection results of the first detection unit and the second detection unit.

[0007] An embodiment of this application also provides a stabilization motor, including: the above-described motor stabilization detection device, a lens, and a light-transmitting film; during imaging, external light passes sequentially through the light-transmitting film and the lens to reach the motor stabilization detection device.

[0008] Embodiments of this application also provide an electronic device, including the above-described motor anti-shake detection device or the above-described anti-shake motor.

[0009] Compared to existing technologies, this embodiment of the application mounts the image sensor on a bracket. The movement of the bracket causes the image sensor to displace relative to the upper base in both a first and second direction. This movement of the image sensor compensates for shake, thus transferring the lens's image stabilization function to the movement of the image sensor. The lens only needs to focus, simplifying lens movement control. Furthermore, the motor-driven image stabilization detection device comprises an upper and a lower moving bracket. The upper moving bracket only undergoes displacement in the first direction and not in the second direction. A first detection unit is mounted on the upper moving bracket, ensuring that its detection results are only affected by the displacement in the first direction. Therefore, the detection results of the first detection unit are more accurate, improving the detection precision of the device. In addition to the first detection unit, a second detection unit is also mounted on the lower moving bracket to detect displacement changes in the second direction. Combining the detection results from both units for shake correction allows for a more comprehensive motor-driven image stabilization effect.

[0010] In addition, the first detection unit includes: a first floating electrode plate fixed to the upper movable bracket, and a first transmitting electrode plate and a first receiving electrode plate fixed to the upper base. The first floating electrode plate is disposed opposite to the first transmitting electrode plate and the first receiving electrode plate, and the projection of the first floating electrode plate toward the upper base overlaps with the first transmitting electrode plate and the first receiving electrode plate. When the upper movable bracket moves in the first direction, the relative area between the first floating electrode plate and the first receiving electrode plate changes with the movement.

[0011] In addition, the second detection unit includes: a second floating electrode plate fixed to the lower movable bracket, and a second transmitting electrode plate and a second receiving electrode plate fixed to the upper base. The second floating electrode plate is disposed opposite to both the second transmitting electrode plate and the second receiving electrode plate, and the projection of the second floating electrode plate toward the upper base overlaps with both the second transmitting electrode plate and the second receiving electrode plate. When the lower movable bracket moves at least in the second direction, the relative area between the second floating electrode plate and the second receiving electrode plate changes with the movement.

[0012] In addition, the second detection unit includes: a detection magnet disposed on the lower movable bracket, and a first magnetic sensor disposed opposite to the detection magnet, the position of the first magnetic sensor being fixed relative to the position of the upper base; when the lower movable bracket moves at least in the second direction, the distance between the detection magnet and the first magnetic sensor changes.

[0013] In addition, the motor anti-shake detection device also includes a drive unit; the drive unit includes a first magnet and a second magnet disposed on the lower moving bracket, and a first coil disposed opposite to the first magnet and a second coil disposed opposite to the second magnet; wherein the first magnet and the first coil are used to control the lower moving bracket to move in a first direction, and the second magnet and the second coil are used to control the lower moving bracket to move in a second direction.

[0014] In addition, the second detection unit includes: a second magnetic sensor disposed adjacent to the second magnet, the position of the second magnetic sensor being relatively fixed relative to the position of the upper base; when the lower moving bracket moves at least in the second direction, the distance between the second magnet and the second magnetic sensor changes.

[0015] In addition, the motor anti-vibration detection device also includes: a fixed roller groove disposed on the surface of the upper base facing the upper movable bracket, the direction of the fixed roller groove being consistent with the first direction; the upper movable bracket includes: a first roller groove disposed opposite to the fixed roller groove, the first roller groove having the same direction as the fixed roller groove, and a first ball being disposed in the roller grooves of the oppositely disposed fixed roller groove and the first roller groove.

[0016] In addition, there are three fixed roller grooves, which are respectively fixed at any three corners of the upper base. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 is an exploded structural diagram of the detection device for motor anti-vibration according to an embodiment of this application;

[0019] Figure 2 is a schematic diagram of the upper and lower movable brackets of the motor anti-vibration detection device according to an embodiment of this application.

[0020] Figure 3 is a schematic diagram of the structure of the first floating electrode plate and the second floating electrode plate in the motor anti-vibration detection device according to an embodiment of this application;

[0021] Figure 4 is a schematic diagram of the structure of each electrode plate in the motor anti-shake detection device according to an embodiment of this application;

[0022] Figure 5 is a schematic diagram of the relevant parameters of each plate in the motor anti-shake detection device according to the embodiment of this application;

[0023] Figure 6 is a schematic diagram of the relevant parameters of each plate in the motor anti-shake detection device according to the embodiment of this application;

[0024] Figure 7 is a graph of the capacitance signal of the first detection unit in the motor anti-shake detection device according to an embodiment of this application;

[0025] Figure 8 is a graph of the capacitance signal of the second detection unit in the motor anti-shake detection device according to an embodiment of this application;

[0026] Figure 9 is a graph showing the differential calculation result of the capacitance signal of the first detection unit in the motor anti-shake detection device according to the embodiment of this application;

[0027] Figure 10 is a graph showing the differential calculation result of the capacitance signal of the second detection unit in the motor anti-shake detection device according to the embodiment of this application.

[0028] Figure 11 is a schematic diagram of the structure of a motor anti-shake detection device according to another embodiment of this application;

[0029] Figure 12 is a schematic diagram of the drive unit of the motor anti-shake detection device according to an embodiment of this application;

[0030] Figure 13 is a schematic diagram of the anti-shake motor according to an embodiment of this application;

[0031] Figure 14 is a schematic diagram of the periscope motor according to an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Upper base;

[0034] 2-Lower base; 21-Processing unit

[0035] 3-Upper movable support; 31-First roller groove; 32-Second roller groove; 33-First ball bearing; 34-Second ball bearing

[0036] 4-Lower movable support; 41-Third roller groove;

[0037] 5-Image sensor;

[0038] 61-First detection unit; 62-Second detection unit; 611-First floating electrode plate; 612-First transmitting electrode plate; 613-First receiving electrode plate; 621-Second floating electrode plate; 622-Second transmitting electrode plate; 623-Second receiving electrode plate; 624-First magnetic sensor; 625-Detection magnet; 626-Detection coil; 627-Second magnetic sensor;

[0039] 7-Fixed groove;

[0040] 8-Drive unit; 81-First magnet; 82-First coil; 83-Second magnet; 84-Second coil;

[0041] 10 - Detection device for motor-driven image stabilization; 20 - Lens; 30 - Lens; 40 - Prism. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to enable readers to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0043] The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0044] The embodiments of this application relate to a motor anti-shake detection device, as shown in Figure 1. The motor anti-shake detection device includes: an accommodating space enclosed by an upper base 1 and a lower base 2, and an upper movable support 3 and a lower movable support 4 sequentially arranged within the accommodating space according to the light incident direction; the upper movable support 3 can only undergo displacement change relative to the upper base 1 in a first direction; the lower movable support 4 can undergo displacement change relative to the upper base 1 in both the first and second directions, and the lower movable support 4 abuts against the upper movable support 3 in the first direction. The movement of the lower movable support 4 in the first direction causes the upper movable support 3 to move accordingly. The two directions are perpendicular; the motor anti-shake detection device also includes: an image sensor 5, which is fixed to the lower moving bracket 4 and moves with the lower moving bracket 4; the motor anti-shake detection device also includes: a first detection unit 61 disposed on the upper moving bracket 3 and a second detection unit 62 disposed on the lower moving bracket 4; the first detection unit 61 is used to detect the movement in the first direction, and the second detection unit 62 is used to detect the movement in the second direction; the motor anti-shake detection device also includes: a processing unit 21, which is used to perform shake correction based on the detection results of the first detection unit 61 and the second detection unit 62.

[0045] Compared to existing technologies, this embodiment of the application mounts the image sensor on a bracket. The movement of the bracket causes the image sensor to displace relative to the upper base in both a first and second direction. This movement of the image sensor compensates for shake, thus transferring the lens's image stabilization function to the movement of the image sensor. The lens only needs to focus, simplifying lens movement control. Furthermore, the motor-driven image stabilization detection device comprises an upper and a lower moving bracket. The upper moving bracket only undergoes displacement in the first direction and not in the second direction. A first detection unit is mounted on the upper moving bracket, ensuring that its detection results are only affected by the displacement in the first direction. Therefore, the detection results of the first detection unit are more accurate, improving the detection precision of the device. In addition to the first detection unit, a second detection unit is also mounted on the lower moving bracket to detect displacement changes in the second direction. Combining the detection results from both units for shake correction allows for a more comprehensive motor-driven image stabilization effect.

[0046] One way to ensure that the upper movable bracket moves only in the first direction is as follows: As shown in Figure 1, the motor anti-vibration detection device includes a fixed roller groove 7 disposed on the surface of the upper base 1 facing the upper movable bracket 3. The direction of the fixed roller groove 7 is consistent with the first direction (the X-axis direction shown in Figure 2). Additionally, as shown in Figure 2, the upper movable bracket 3 includes a first roller groove 31 disposed opposite to the fixed roller groove 7. The first roller groove 31 has the same direction as the fixed roller groove 7, and a first ball bearing 33 is disposed within the roller grooves of the oppositely disposed fixed roller groove 7 and the first roller groove 31. When the upper movable bracket 3 moves along the first direction (the X-axis direction shown in Figure 2), the first ball bearing 33 rolls in the first channel formed between the fixed roller groove 7 and the first roller groove 31, allowing the upper movable bracket 3 to generate displacement in the first direction relative to the upper base 1. When the upper movable bracket 3 wants to move in the second direction (Y-axis direction as shown in Figure 2), since the direction of movement is inconsistent with the direction of the first channel formed by the first ball between the fixed groove 7 and the first groove 31, the first ball will be stuck on the inner wall of the first channel and cannot move. The upper movable bracket 3 is unable to move in the second direction due to the resistance of the first channel and the first ball.

[0047] Furthermore, to ensure that the upper movable support 3 moves with the lower movable support 4 in the first direction, and that the movement of the lower movable support 4 in the second direction does not affect the position of the upper movable support 3, as shown in Figure 2, a second roller groove 32 is provided on the lower surface of the upper movable support 3 (the surface near the lower movable support 4). The direction of the second roller groove 32 is consistent with the second direction (the Y-axis direction shown in Figure 2), that is, the direction of the second roller groove 32 is perpendicular to the direction of the first roller groove 31. Simultaneously, a third roller groove 41 is provided on the upper surface of the lower movable support 4 (the surface near the upper movable support 3). The direction of the third roller groove 41 is consistent with the direction of the second roller groove 32. The third roller groove 41 and the second roller groove 32 form a second channel in the second direction, and a second ball bearing 34 is disposed within the second channel. When the lower moving bracket 4 moves along the first direction (X-axis direction as shown in Figure 2), because the direction of movement is inconsistent with the direction of the second channel formed by the second ball 34 between the third groove 41 and the second groove 32, the second ball 34 will be stuck on the inner wall of the second channel and cannot move. The upper moving bracket 3 and the lower moving bracket 4 are relatively fixed in the first direction. Therefore, when the lower moving bracket 4 moves in the first direction, it will drive the upper moving bracket 3 to move, and the two move synchronously in the first direction. However, when the lower moving bracket 4 moves in the second direction (Y-axis direction as shown in Figure 2), the direction of movement is consistent with the direction of the second channel. Therefore, the second ball can roll in the second channel, and the lower moving bracket 4 and the upper moving bracket 3 can generate relative displacement in the second direction. However, because the upper moving bracket 3 is stuck by the first ball and the inner wall of the first channel, the upper moving bracket 3 will not move in the second direction. Therefore, only the lower moving bracket 4 moves in the second direction, and at this time the upper moving bracket 3 will not generate displacement change in the second direction.

[0048] Furthermore, to enhance the overall stability of the device, the number of fixed roller slots can be greater than two. For example, three or four fixed roller slots can be evenly distributed on the lower surface of the upper base. For conventional sensor shift optical image stabilization (SIO), four fixed roller slots can form a symmetrical structure. For periscope sensor shift optical image stabilization (SIO), due to space limitations, the number of fixed roller slots can be reduced appropriately. For example, three fixed roller slots can form a stable triangular structure. Specifically, the three fixed roller slots are fixed at at least three corners of the upper base. In practice, the fixed roller slots can be placed at any three corners where there is relatively ample space, depending on the arrangement of the internal components.

[0049] The configuration of the first detection unit and the second detection unit is as follows: As shown in Figures 3 and 4, the first detection unit includes: a first floating electrode plate 611 fixed on the upper movable bracket, and a first transmitting electrode plate 612 and a first receiving electrode plate 613 fixed on the upper base. The first floating electrode plate 611 is arranged opposite to the first transmitting electrode plate 612 and the first receiving electrode plate 613, and the projection of the first floating electrode plate 611 toward the upper base overlaps with the first transmitting electrode plate 612 and the first receiving electrode plate 613. When the upper movable bracket moves in the first direction, the relative area between the first floating electrode plate 611 and the first receiving electrode plate 613 changes with the movement.

[0050] The second detection unit includes: a second floating electrode plate 621 fixed to the lower movable bracket, and a second transmitting electrode plate 622 and a second receiving electrode plate 623 fixed to the upper base. The second floating electrode plate 621, the second transmitting electrode plate 622, and the second receiving electrode plate 623 are all arranged opposite to each other, and the projection of the second floating electrode plate 621 toward the upper base overlaps with the second transmitting electrode plate 622 and the second receiving electrode plate 623. When the lower movable bracket moves at least in the second direction, the relative area between the second floating electrode plate 621 and the second receiving electrode plate 623 changes with the movement.

[0051] Since the upper movable bracket is positioned between the lower movable bracket and the upper base, a clearance design is required in the upper movable bracket to ensure that the second floating electrode plate on the lower movable bracket can be positioned opposite the second transmitting electrode plate and the second receiving electrode plate on the upper base. This means that the position of the second floating electrode plate in the lower movable bracket is exposed to face the second transmitting electrode plate and the second receiving electrode plate on the upper base. Furthermore, since the distance between the second floating electrode plate and the second transmitting electrode plate and the second receiving electrode plate is related to signal strength, and a high-strength signal is beneficial for improving the sensitivity of the second detection unit, the position of the second floating electrode plate in the lower movable bracket can be protruded to reduce the distance between the second floating electrode plate and the second transmitting electrode plate and the second receiving electrode plate.

[0052] The above describes an implementation where both the first detection unit and the second detection unit are capacitive detection structures. Figure 3 is a structural diagram of the device with the upper base and the components mounted on it hidden, and Figure 4 is a structural diagram of the device with the upper base hidden, so as to facilitate direct observation of the first transmitting electrode and the first receiving electrode of the first detection unit, as well as the second transmitting electrode and the second receiving electrode of the second detection unit.

[0053] The setting parameters of each electrode plate in the first and second detection units are shown in Figure 5. In the first direction (X-axis direction shown in Figure 5), there is a certain distance d between the edge of the first floating electrode plate 611 and the edge of the first transmitting electrode plate 612 to ensure that the facing area of ​​the first floating electrode plate 611 and the first transmitting electrode plate 612 remains unchanged when the first floating electrode plate 611 reciprocates along the first direction. In addition, the width of the first floating electrode plate 611 in the first direction is set to w2 to ensure that the facing area of ​​the first floating electrode plate 611 and the first transmitting electrode plate 612 is large enough, thereby ensuring that the first detection unit can have sufficient transmission signal and improve the signal strength detected in the first detection unit. There are two first receiving electrodes 613 in the first detection unit. The two first receiving electrodes 613 are arranged at intervals in the first direction, both are on the same plane, and both first receiving electrodes 613 are parallel to the first floating electrode plate 611. The edge of the first floating electrode 611 and the inner edges of the two first receiving electrodes 613 must maintain a certain distance 'a' to ensure that, when the first floating electrode 611 reciprocates along the first direction, the first floating electrode 611 and the two first receiving electrodes 613 always have a directly facing area. Furthermore, the width of the second floating electrode 621 in the first direction is set to w1, where w1 is less than w2.

[0054] In the second direction (Y-axis direction shown in Figure 5), there is a certain distance d between the edge of the second floating electrode 621 and the edge of the second transmitting electrode 622 to ensure that the facing area of ​​the second floating electrode 621 and the second transmitting electrode 622 remains unchanged when the second floating electrode 621 reciprocates along the second direction. Meanwhile, since the second floating electrode 621 also reciprocates along the first direction (X-axis direction shown in Figure 5) of the lower moving bracket, to reduce the impact of the movement of the second floating electrode 621 in the first direction on the detection results of the second detection unit, it is necessary to avoid sudden changes in the capacitance signal caused by the movement of the second floating electrode 621 in the first direction. Therefore, there is a certain distance f between the second floating electrode 621 and the outer edge of the second transmitting electrode 622 and the outer edge of the second receiving electrode 623 in the first direction to prevent the second floating electrode 621 from exceeding the projection range of the second transmitting electrode 622 and the second receiving electrode 623 when reciprocating in the first direction. In addition, the second floating electrode plate 621 also includes a first part and a second part with different lengths in the second direction. The first part of the second floating electrode plate 621 is positioned opposite to the second transmitting electrode plate 622. Most of the area of ​​the second part of the second floating electrode plate 621 is opposite to the second receiving electrode plate 623, and the remaining second part with a width of L is opposite to the second receiving electrode plate 622. This ensures that the change in the area of ​​the opposite side between the second receiving electrode plate 622 and the second floating electrode plate 621 is linear when the plate moves back and forth in the first direction, which facilitates subsequent calculations.

[0055] The above descriptions of the setting parameters for each electrode plate in the first and second detection units refer to the setting parameters for each electrode plate in the initial state.

[0056] The detection principles for displacement changes in the first direction using the first detection unit and displacement changes in the second direction using the second detection unit are explained below:

[0057] Taking the first detection unit as an example, the capacitance formed by the first floating plate, the first emitting plate, and the first receiving plate can be considered as the sum of the capacitance formed by the first emitting plate and the first floating plate, and the capacitance formed by the first floating plate and the first receiving plate. The capacitance of each plate is calculated using the physical formula for a parallel plate capacitor: C = εS / 4πkd; where ε represents the dielectric constant of the medium, determined by the medium between the plates, such as air or water; and k represents the electrostatic constant, also known as the Coulomb constant, which indicates that the force between two point charges, each with a charge of 1C, separated by a distance of 1m in a vacuum is 8.987551 × 10⁻⁶. 9 N, i.e., k = 8.987551 × 10 9 N·m 2 / C; S represents the area (projected area) of the two plates facing each other; d represents the vertical distance between the two plates; π represents pi. Therefore, when the area of ​​the first floating plate and the first receiving plate facing each other changes, the capacitance signal generated by the capacitor formed by the first floating plate, the first transmitting plate, and the first receiving plate changes accordingly. Based on the correspondence between the change in the facing area and the change in the capacitance signal, the distance moved by the first floating plate in the first direction can be determined. Since the first floating plate, the upper moving bracket, the lower moving bracket, and the image sensor on the lower moving bracket move synchronously in the first direction, the distance moved by the image sensor in the first direction can be determined from the distance moved by the first floating plate. The capacitance detection principle of the second detection unit is the same. The distance moved by the image sensor in the second direction can be obtained using the second detection unit. Combining the detection results of the first and second detection units, the movement of the image sensor in the plane can be determined, thereby achieving image stabilization control.

[0058] The number of receiving plates in the first detection unit and the second detection unit can each be set to two. When moving in the first direction, the first change in the area of ​​the first floating plate facing one of the first receiving plates and the second change in the area of ​​the first floating plate facing the other first receiving plate are the same. That is, the decrease in the area of ​​the first floating plate facing one of the first receiving plates and the increase in the area of ​​the first floating plate facing the other first receiving plate are the same. Alternatively, the increase in the area of ​​the first floating plate facing one of the first receiving plates and the decrease in the area of ​​the first floating plate facing the other first receiving plate are the same. This design facilitates subsequent differential calculation of the capacitance signal to correct or denoise the capacitance signal, eliminate noise that affects the accuracy of the calculation results caused by environmental factors or human operation factors, and improve the sensitivity of lens position movement control. The differential calculation formula can be: magnification factor × (CX11 - CX12) / (CX11 + CX12); where CX11 represents the capacitance signal formed by the first floating electrode and one of the first receiving electrodes, and CX12 represents the capacitance signal formed by the first floating electrode and the other first receiving electrode. The two second receiving electrodes in the second detection unit are also designed to facilitate subsequent differential calculation of the capacitance signal, allowing for correction or noise reduction, eliminating noise that affects the accuracy of the calculation results due to environmental factors or human operation, and improving the sensitivity of lens position movement control. The differential calculation of the capacitance signal in the second detection unit and the setting rules for the two receiving electrodes are similar to those described for the first detection unit, and will not be repeated here.

[0059] Furthermore, to further reduce the impact of movement in the first direction on the detection results of the second detection unit, the second floating electrode plate can be adjusted as shown in Figure 6, consisting of three parts of different lengths in the second direction. One part of the second floating electrode plate 621 corresponds to the second receiving electrode plate 623, and the distance between the edge of this part and the edge of the second receiving electrode plate 623 is defined as I. Another part corresponds to the second transmitting electrode plate 622, and the distance between the edge of this part and the edge of the second receiving electrode plate 622 is defined as L. The values ​​of I and L are related to the maximum positive and negative stroke in the first direction to ensure that, regardless of movement, the second receiving electrode plate and the second transmitting electrode plate are always aligned with their corresponding parts of the second floating electrode plate. The last part connects the above two parts, and the length of this connecting part in the second direction is the shortest. The length of the connecting part in the second direction can be set to be slightly smaller than the gap between the two second receiving electrodes to minimize the impact of the connecting part on the capacitance signal. Using the electrode plate design scheme shown in Figure 6, simulation tests were performed on the capacitance signals of the first and second detection units, and the simulation results shown in Figures 7 and 8 were obtained. Figure 7 shows the capacitance changes of the two first receiving plates in the first detection unit when they move no distance in the Y-axis direction and when they move 500 μm in the Y-axis direction, respectively, with a distance between -500 μm and 500 μm. Figure 8 shows the capacitance changes of the two second receiving plates in the second detection unit when they move no distance in the X-axis direction and when they move 500 μm in the X-axis direction, respectively, with a distance between -500 μm and 500 μm. As can be seen from the curves in Figures 7 and 8, changes in the Y-axis direction of the two first receiving plates in the first detection unit have almost no impact on the resulting capacitance changes. Changes in the X-axis direction of the two second receiving plates in the second detection unit have a relatively small impact on the resulting capacitance changes. After differential calculation of the generated capacitance values, the curves shown in Figures 9 and 10 are obtained. Figure 9 represents the numerical changes of the two capacitors formed by the two first receiving plates and the first transmitting plate in the first detection unit after differential calculation, and Figure 10 represents the numerical changes of the two capacitors formed by the two second receiving plates and the second transmitting plates in the second detection unit after differential calculation. As can be seen from Figures 9 and 10, the detection results obtained by the first detection unit after differential calculation are almost unaffected by movement in the Y-axis direction, and the detection results obtained by the second detection unit after differential calculation are almost unaffected by movement in the X-axis direction, thus solving the crosstalk problem caused by movement in both directions.

[0060] When both the first and second detection units are capacitive detection units, the first and second emitting plates can be integrally formed. This way, it is only necessary to electrically connect the integrally formed emitting plate to the circuit board, which simplifies the wiring.

[0061] Besides capacitive detection units, the first and second detection units can also be electromagnetic detection units. Alternatively, to avoid interference between signals (electric or magnetic fields) generated by the same type of detection unit, the two detection units can be configured as different types of detection units. The following explanation uses an example where the first detection unit is a capacitive detection unit and the second detection unit is an electromagnetic detection unit:

[0062] As shown in Figure 11, the configuration of the first detection unit is consistent with that of the capacitive detection unit described above, and will not be repeated here. The second detection unit includes: a detection magnet 625 disposed on the lower movable bracket, and a first magnetic sensor 624 and a detection coil 626 disposed opposite to the detection magnet 625. The position of the first magnetic sensor 624 is fixed relative to the position of the upper base. When the lower movable bracket moves at least in the second direction, the distance between the detection magnet 625 and the first magnetic sensor 624 changes, thereby causing a change in the magnetic field detected by the first magnetic sensor 624. The detection accuracy of the capacitive detection unit and the electromagnetic detection unit will differ due to environmental influences. Higher-accuracy detection units can be configured for more frequent use, and lower-accuracy detection units for less frequent use, thus achieving a better overall detection effect for the device.

[0063] Additionally, as shown in Figure 12, the motor anti-shake detection device further includes a drive unit 8; the drive unit 8 includes a first magnet 81 and a second magnet 83 disposed on the lower moving bracket, a first coil 82 disposed opposite to the first magnet 81, and a second coil 84 disposed opposite to the second magnet 83; wherein, the first magnet 81 and the first coil 82 are used to control the lower moving bracket to move in a first direction, and the second magnet 83 and the second coil 84 are used to control the lower moving bracket to move in a second direction. The second detection unit can reuse the magnetic field generated by the magnets and coils in the drive unit for detection to determine the movement of the image sensor, thereby reducing the cost of the second detection unit. Specifically, the second detection unit includes a second magnetic sensor 627 disposed adjacent to the second magnet 83, the position of the second magnetic sensor 627 being relatively fixed relative to the position of the upper base; when the lower moving bracket moves at least in the second direction, the distance between the second magnet and the second magnetic sensor changes.

[0064] The first and second magnetic sensors can be sensors used for magnetic field detection, such as Hall sensors or TMR sensors.

[0065] The coils and magnetic sensors described above can be mounted on the upper base, the lower base, or the fixed parts extending from the upper and lower bases, as long as the positions of the coils and magnetic sensors relative to the upper or lower bases are fixed.

[0066] Another feasible embodiment of this application relates to a stabilization motor, as shown in FIG13. The stabilization motor includes: the above-mentioned motor stabilization detection device 10, lens 20 and light-transmitting sheet 30; during imaging, external light passes through the light-transmitting sheet 30 and lens 20 in sequence and reaches the motor stabilization detection device 10.

[0067] Additionally, due to the thickness limitations of mobile phones, the direction of incident light can be changed using a prism, allowing the light to travel parallel to the surface of the phone screen, thereby altering the focal length. When the image stabilization motor is a periscope motor including a prism, as shown in Figure 14, it includes: the aforementioned motor stabilization detection device 10, a lens 20, a light-transmitting plate 30, and a prism 40. Light passes through the light-transmitting plate 30, is refracted by the prism 40 into the lens 20, and then refracted again by a second prism 40 to reach the image sensor of the motor stabilization detection device 10. Choosing two prisms to change the light direction provides sufficient movement space for the image sensor. If the image sensor has enough movement space, only one prism can be used to change the light propagation direction once. Furthermore, the two prism refractions prevent image flipping, ensuring correct imaging direction.

[0068] Compared with related technologies, the anti-shake motor provided in this application embodiment is equipped with the motor anti-shake detection device provided in the aforementioned embodiment. Therefore, it also has the technical effects provided in the aforementioned embodiment, which will not be elaborated here.

[0069] Another feasible embodiment of this application relates to an electronic device, including the above-described motor anti-shake detection device or the above-described anti-shake motor.

[0070] Compared with related technologies, the electronic device provided in this application embodiment is equipped with the motor anti-shake detection device or anti-shake motor provided in the aforementioned embodiments. Therefore, it also has the technical effects provided in the aforementioned embodiments, which will not be elaborated here.

[0071] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing this application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. A detection device for motor vibration stabilization, comprising: The accommodating space enclosed by the upper base and the lower base, and the upper movable support and the lower movable support arranged sequentially within the accommodating space according to the direction of light incidence; The upper movable support can only be displaced relative to the upper base in the first direction; The lower movable support can be displaced relative to the upper base in both a first direction and a second direction. The lower movable support abuts against the upper movable support in the first direction. The movement of the lower movable support in the first direction causes the upper movable support to move accordingly. The first direction is perpendicular to the second direction. The motor anti-shake detection device further includes: an image sensor, which is fixed to the lower movable bracket and moves with the lower movable bracket; The motor anti-vibration detection device further includes: a first detection unit disposed on the upper movable support and a second detection unit disposed on the lower movable support; The first detection unit is used to detect movement in the first direction, and the second detection unit is used to detect movement in the second direction; The motor anti-vibration detection device further includes a processing unit, which is used to perform vibration correction based on the detection results of the first detection unit and the second detection unit.

2. The motor-shake detection apparatus according to claim 1, wherein The first detection unit includes: a first floating electrode plate fixed to the upper movable bracket, and a first transmitting electrode plate and a first receiving electrode plate fixed to the upper base. The first floating electrode plate is disposed opposite to the first transmitting electrode plate and the first receiving electrode plate, and the projection of the first floating electrode plate toward the upper base overlaps with the first transmitting electrode plate and the first receiving electrode plate. When the upper movable support moves in the first direction, the relative area between the first floating electrode plate and the first receiving electrode plate changes with the movement.

3. The motor-shake detection apparatus according to claim 1, wherein The second detection unit includes: a second floating electrode plate fixed to the lower movable bracket, and a second transmitting electrode plate and a second receiving electrode plate fixed to the upper base. The second floating electrode plate is disposed opposite to the second transmitting electrode plate and the second receiving electrode plate, and the projection of the second floating electrode plate toward the upper base overlaps with the second transmitting electrode plate and the second receiving electrode plate. When the lower moving support moves at least in the second direction, the relative area between the second floating electrode plate and the second receiving electrode plate changes with the movement.

4. The motor-shake detection apparatus according to claim 2, wherein The second detection unit includes: a detection magnet disposed on the lower movable bracket, and a first magnetic sensor disposed opposite to the detection magnet, wherein the position of the first magnetic sensor is fixed relative to the position of the upper base; When the lower movable bracket moves at least in the second direction, the distance between the detection magnet and the first magnetic sensor changes.

5. The motor vibration stabilization detection device according to claim 1, wherein, Also includes: Drive unit; The drive unit includes a first magnet and a second magnet disposed on the lower moving bracket, a first coil disposed opposite to the first magnet, and a second coil disposed opposite to the second magnet; wherein the first magnet and the first coil are used to control the lower moving bracket to move in a first direction, and the second magnet and the second coil are used to control the lower moving bracket to move in a second direction.

6. The motor vibration stabilization detection device according to claim 5, wherein, The second detection unit includes: a second magnetic sensor disposed adjacent to the second magnet, the position of the second magnetic sensor being fixed relative to the position of the upper base; When the lower movable bracket moves at least in the second direction, the distance between the second magnet and the second magnetic sensor changes.

7. The motor vibration stabilization detection device according to claim 1, wherein, Also includes: A fixed roller groove is provided on the surface of the upper base facing the upper movable bracket, and the direction of the fixed roller groove is consistent with the first direction; The upper movable support includes: a first roller groove disposed opposite to the fixed roller groove, the first roller groove having the same groove direction as the fixed roller groove, and a first ball bearing disposed within the grooves of the oppositely disposed fixed roller groove and the first roller groove.

8. The motor vibration stabilization detection device according to claim 7, wherein, The number of fixed roller grooves is three, and the three fixed roller grooves are respectively fixed at any three corners of the upper base.

9. A shake-stabilizing motor, comprising: The detection device for motor image stabilization as described in any one of claims 1 to 8, comprising a lens and a light-transmitting film; During imaging, external light passes sequentially through the light-transmitting sheet and the lens, reaching the motor stabilization detection device.

10. An electronic device, comprising: The detection device for motor anti-shake as described in any one of claims 1 to 8, or the anti-shake motor as described in claim 9.

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